Combined bevel and square.



UNITED STATES PATENT OFFICE.

COMBINED BEVEL AND SQUARE.

Specification of Letters Patent.

Application filed December 14, 1911.

Patented Oct. 1,1912.

Serial No. 665,777.

To all whom 'it may concern:

Be it known that 1, WILLIAM It. BU- CHANAN, a citizen of the United States, residing at Carrsville, in the county of Livingston and State of Kentucky, have invented certain new and useful Improvements in Combined Bevels and Squares; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to measuring instruments, and more especially to squares of that kind which fold; and the object of the same is to produce a single instrument combining a square, a bevel and a gage. This and other objects are accomplished by the construction hereinafter more fully described and claimed and as shown in the drawings wherein Figure 1 is a plan view of this device, showing its members or rules as opened and set to indicate a certain bevel, the dotted line across the upper end of the base rule indicating a line which may have been drawn on the paper or board in the act of opening the device to the position shown. Fig. 2 is a central longitudinal section with the parts folded. Fig. 3 is a cross section on the line 3-3 of Fig. 2, and Fig. 1 is a lower end elevation thereof, the dotted lines in the last-named view indicating the edge of a board against which this instrument may be placed.

In the drawings, the numeral 1 designates a stock or piece of wood (preferably veneered in several layers) upon which the metallic members or parts of this instru ment are carried, and 2 is what might be called the base rule which is secured upon the stock 1 by screws 3 or otherwise and in such position that both ends and both edges of the rule overlie the corresponding ends and edges of the stock so as to form a flange as best seen in Figs. 3 and 1. At what might be called its lower end, the base rule is provided with a longitudinal slot 4: as shown, and the upper face of the stock 1 beneath this slot is provided with a groove 5 somewhat wider than the slot so that the edges of the latter overhang and form guides. A block 7 has grooves 6 along its edges which move on said guides as the block travels up and down the slot and the groove, and a set screw 8 passing through this block and hearing at its tip upon the bottom of the groove permits the setting of the block in any position desired. Along both edges of the face of the base rule 2 are graduations which may be inches or in the metric system, and along one edge of the slot 4 are graduations 9 coacting with the lower corner of the block for the purpose of indicating the angle to the vertical to which the arm is adjusted. v

At what might be called the upper end of the base rule 2 an ear 10 projects therefrom and is pierced with an eye whose center lies accurately over the end of the rule and accurately at the transverse center thereof,

and on a pin such as a rivet 11 in said eye is pivoted the upper end of a link 12 whose lower end is pivoted as at 13 to the center of the pitch rule 14, the lower end of the latter being pivoted as at 15 to the block 7 Its upper end carries a socket 16 for a point 17 (or it might be a pencil or pen) whose aXis stands on a line at right angles to the face of the base rule 2 and whose tip is dis posed so as to move accurately across the upper end thereof as shown.

In the use of this instrument, the stock is laid against one edge of a piece of board as indicated by the reference letter B, and the flange at one edge of the base rule 2 overlies the upper corner of the board as shown, the instrument is then moved to a point along said board where it is desired to draw a transverse line at right angles to the edge referred to, and when the upper end of the base rule lies on said point the operator grasps the socket 16 and moves it to the right so that the point of the scratcher or pencil is drawn across the board as the dotted line in Fig. 1 indicates. During this action the link 12 swings on its upper pivot through the ear 10 and the pitch rule 14 swings on the pivot which connects it with said link, its lower end swinging on the pivot 15 while the block moves upward in the slot 4, and its upper end carrying the point or pencil moves straight to the right as has been stated. A reversal of this operation brings the point or pencil back to the position shown in Fig. 2, when the movable parts are housed or nested over or upon the face of the base rule, and the entire instrument can be inserted in the pocket as usual. When the instrument is to be used for finding and indicating a bevel, the pitch rule 14:

is set at the required angle with one edge of i the base rule 2 and the set screw tightened Y may be drawn along the right hand e ge of the pitch rule 14 when the bevel line is to be marked. This instrument is also useful as an edge guide marking gage, by setting the tip of the scratcher or pencil at the desired distance from the right edge of the stock 1, then laying the whole upon the board with said edge against the edge thereof, and drawing it along the same so that the tip of the scratcher or pencil marks the board as desired.

I do not limit myself to the precise de tails of construction further than as set forth below, and changes therein may be made at the will of the manufacturer.

vVhat is claimed as new is:

1. In an instrument of the class described, the combination with a stock having a longitudinal central groove along its upper face, and a base rule secured upon said face and having a longitudinal slot overlying and narrower than said groove and opening out at one end of this rule and a perforated ear at the transverse center of the other end of this rule; of a block having grooved edges slidably engaging the edges of said slot, a pitch rule pivoted at one end upon said block and having means at its other end for carrying a point or pencil, and a link pivotally connecting said ear with a point in the pitch rule which is distant from the pencil point the same as the length of said link, for the purpose set forth.

2. In an instrument of the class described, the combination with a base rule having a longitudinal slot opening out at one end of this rule and a perforated car at the transverse center of the other end of this rule; of a block slidably engaging the edges of said slot, a pitch rule pivoted at one end upon said block and having a socket at its other end for carrying a point or pencil, and a link pivotally connecting said ear with a point in the pitch rule which is distant from the pencil point the same as the length of said link, for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WILLIAM R. BUCHANAN. W'itnesses:

THOS. SMOGK, CHAS. P. THRUBED.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

